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MOX fuel assembly for transmutation and power flattening and method of power flattening

A fuel assembly and power technology, applied in the field of nuclear engineering, can solve the problems of long half-life and inability to make full use of fissionable resources, and achieve the effects of flattening power, reducing cost and difficulty, and enhancing core safety

Active Publication Date: 2019-02-05
SUN YAT SEN UNIV
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Problems solved by technology

However, spent fuel contains high levels of fissionable isotopes, and direct landfilling cannot make full use of these fissionable resources; in addition, because the half-life of some minor actinides in spent fuel is very long, whether the container that wraps spent fuel can withstand long enough time is uncertain

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  • MOX fuel assembly for transmutation and power flattening and method of power flattening
  • MOX fuel assembly for transmutation and power flattening and method of power flattening
  • MOX fuel assembly for transmutation and power flattening and method of power flattening

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Embodiment Construction

[0027] The MOX fuel assembly used for transmutation and flattening power of the present invention comprises a doped fuel rod, a fuel rod and a guide tube, the doped fuel rod is a fuel rod doped with long-lived minor actinide nuclides; The miscellaneous fuel rods, the fuel rods and the guide tubes form an array, the guide tubes are uniformly dispersed in the array, and the doped fuel rods are adjacent to the guide tubes.

[0028] The long-lived minor actinides in doped fuel rods are transmuted into short-lived or stable nuclides in the neutron field, thereby reducing the cost and difficulty of final disposal of spent fuel, and can solve the problem of long-lived minor actinides in spent fuel. Actinide handling issues. Due to the action of the moderator, the fast neutrons produced by the fission reaction are moderated into thermal neutrons. In general, moderated neutrons react more frequently with nuclei, e.g., 239 The thermal neutron fission cross section of Pu and other fiss...

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Abstract

The invention relates to an MOX fuel component for evolving and flattening power and a method of flattening power. The component comprises doped fuel rods, fuel rods and guide tubes, wherein the doped fuel rods are fuel rods doped with long-life sub-actinide nuclides; the doped fuel rods, the fuel rods and the guide tubes form an array, and each doped fuel rod is adjacent to one of the guide tubes. In the MOX fuel component, the fuel rods adjacent to the guide tubes are installed as the doped fuel rods, and the long-life sub-actinide nuclides in the doped fuel rods are evolved in the neutron field, thereby reducing the costs and difficulty of final treatment of spent fuel. At the same time, the fission reaction rate of the doped fuel rods is reduced to lower the original high power around the guide tubes in the MOX fuel component, thereby achieving the effects of flattening the power of the MOX fuel component and enhancing the safety of a reactor core.

Description

technical field [0001] The invention relates to the technical field of nuclear engineering, in particular to a MOX fuel assembly capable of transmuting minor actinide nuclides and flattening power. Background technique [0002] With the rapid growth of our country's economy, the demand for energy has greatly increased, especially after the signing of the Paris Agreement, the development of green energy has become a top priority. Nuclear energy is characterized by high efficiency, cleanliness and stability, which meets my country's energy needs. In recent years, my country's pressurized water reactor nuclear power plants have grown rapidly, but the accumulation of spent fuel has also increased rapidly. These spent fuels have a long lifespan and high radiotoxicity, threatening the human living environment for a long time. [0003] Spent fuel disposal issues, especially minor actinide nuclides with long half-lives in spent fuel 237 Np, 241 Am, 243 Am, 244 Cm and 245 The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/328G21C19/48
CPCG21C3/328G21C19/48Y02E30/30Y02W30/50
Inventor 袁岑溪陈胜利
Owner SUN YAT SEN UNIV
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